// Get the animated parameters of a camera contained in the scene
// and store them in the associated member variables contained in
// the camera.
void GetCameraAnimatedParameters(FbxNode* pNode, FbxTime& pTime, FbxAnimLayer* pAnimLayer)
{
FbxCamera* lCamera = (FbxCamera*) pNode->GetNodeAttribute();
lCamera->Position.Set(GetGlobalPosition(pNode, pTime).GetT());
FbxAnimCurve* fc = lCamera->Roll.GetCurve(pAnimLayer);
if (fc)
lCamera->Roll.Set(fc->Evaluate(pTime));
FbxCamera::EApertureMode lCameraApertureMode = lCamera->GetApertureMode();
if (lCameraApertureMode == FbxCamera::eHorizontal ||
lCameraApertureMode == FbxCamera::eVertical)
{
double lFieldOfView = lCamera->FieldOfView.Get();
fc = lCamera->FieldOfView.GetCurve(pAnimLayer);
if (fc)
lFieldOfView = fc->Evaluate(pTime);
//update FOV and focal length
lCamera->FieldOfView.Set( lFieldOfView);
lCamera->FocalLength.Set( lCamera->ComputeFocalLength( lFieldOfView));
}
else if ( lCameraApertureMode == FbxCamera::eHorizAndVert)
{
double lOldFieldOfViewX = lCamera->FieldOfViewX.Get();
double lOldFieldOfViewY = lCamera->FieldOfViewY.Get();
//update FOV
double lNewFieldOfViewX = lOldFieldOfViewX;
double lNewFieldOfViewY = lOldFieldOfViewY;
fc = lCamera->FieldOfViewX.GetCurve(pAnimLayer);
if (fc)
lNewFieldOfViewX = fc->Evaluate(pTime);
fc = lCamera->FieldOfViewY.GetCurve(pAnimLayer);
if (fc)
lNewFieldOfViewY = fc->Evaluate(pTime);
lCamera->FieldOfViewX.Set(lNewFieldOfViewX);
lCamera->FieldOfViewY.Set(lNewFieldOfViewY);
//update aspect
double lUpdatedApertureX = lCamera->GetApertureWidth();
double lUpdatedApertureY = lCamera->GetApertureHeight();
lUpdatedApertureX *= tan( lNewFieldOfViewX * 0.5 * FBXSDK_PI_DIV_180) / tan( lOldFieldOfViewX * 0.5 * FBXSDK_PI_DIV_180);
lUpdatedApertureY *= tan( lNewFieldOfViewY * 0.5 * FBXSDK_PI_DIV_180) / tan( lOldFieldOfViewY * 0.5 * FBXSDK_PI_DIV_180);
lCamera->FilmWidth.Set( lUpdatedApertureX);
lCamera->FilmHeight.Set( lUpdatedApertureY);
lCamera->FilmAspectRatio.Set( lUpdatedApertureX / lUpdatedApertureY);
}
else if ( lCameraApertureMode == FbxCamera::eFocalLength)
{
double lFocalLength = lCamera->FocalLength.Get();
fc = lCamera->FocalLength.GetCurve(pAnimLayer);
if (fc && fc ->Evaluate(pTime))
lFocalLength = fc->Evaluate( pTime);
//update FOV and focal length
lCamera->FocalLength.Set( lFocalLength);
lCamera->FieldOfView.Set( lCamera->ComputeFieldOfView( lFocalLength));
}
}
